<template>
  <el-container class="home-container">
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <el-container>
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <div class="toggle-button" @click="toggleCollapse">|||</div>
      <el-menu background-color="#333744" text-color="#fff" active-text-color="#409bff"
      unique-opened :collapse="isCollapse" :collapse-transition="false" router
      :default-active="activePath">
        <!--一级菜单-->
        <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
        <!--一级菜单的模版区域-->
        <template slot="title">
          <!--图标-->
          <i :class="iconObj[item.id]"></i>
          <!--文本-->
          <span>{{item.authName}}</span>
        </template>
        <!--二级菜单-->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
        @click="saveNavState('/'+subItem.path)">
          <template slot="title">
          <!--图标-->
          <i class="el-icon-menu"></i>
          <!--文本-->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
      </el-menu>
    </el-aside>
    <el-main>
      <!--路由占位符-->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name: 'HomePage',
  data() {
    return {
      menulist: [],
      iconObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-check',
        101: 'el-icon-s-goods',
        102: 'el-icon-s-order',
        145: 'el-icon-s-data'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.mesg)
      } else {
        this.menulist = res.data
      }
    },
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      // 保存链接的激活状态
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container{
    height: 100%;
  }

  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #ffff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
  }

  .el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
  }

  .el-main{
    background-color: #eaedf1;
  }

  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
